Build failure when targeting `powerpc64-unknown-linux-gnu`

[rami3l]

The regression happened between 20260202 and 20260204:

= note: /x-tools/powerpc64-unknown-linux-gnu/lib/gcc/powerpc64-unknown-linux-gnu/8.5.0/../../../../powerpc64-unknown-linux-gnu/bin/ld: /checkout/target/powerpc64-unknown-linux-gnu/debug/deps/libopenssl_sys-05b0abda159f9dc2.rlib(libcrypto-lib-aes-gcm-ppc.o): ABI version 2 is not compatible with ABI version 1 output
          /x-tools/powerpc64-unknown-linux-gnu/lib/gcc/powerpc64-unknown-linux-gnu/8.5.0/../../../../powerpc64-unknown-linux-gnu/bin/ld: failed to merge target specific data of file /checkout/target/powerpc64-unknown-linux-gnu/debug/deps/libopenssl_sys-05b0abda159f9dc2.rlib(libcrypto-lib-aes-gcm-ppc.o)

https://github.com/rust-lang/rustup/actions/runs/21734438192/job/62696277679

[rami3l]

Possible culprit: https://github.com/rust-lang/rustup/blame/732af766337a8939cdc777cb0f8e4e65b55d9403/Cargo.lock#L1466

[rami3l]

We really should be off Mr. OpenSSL's wild ride 🤦

[rami3l]

Upstreamed to alexcrichton/openssl-src-rs#279 and transitively openssl/openssl#29815, a fix should be available once openssl/openssl@5aaa7e5 lands in openssl-src.

(Nice to see you there, @weihanglo!)

[weihanglo]

Always openssl